Question

A ladder with a length of 14.1 m and weight
of 525.0 N rests against a frictionless wall,
making an angle of 59.0 with the horizontal.
Find the horizontal force exerted on the
base of the ladder by Earth when a firefighter
weighing 854.0 N is 3.37 m from the bottom
of the ladder.

Answer in units of N

I cannot seem to figure out this one. I attempted to solve this
problem as follows
Force= (525N*(14.1*cos59)+854N*(3.37m/2)) / (14.1*sin59)
The answer I received was 276.7878836N, but apparent;y that is
incorrect. Any help would be appreciated.